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Sale Price $19.26.
Original Price $22.65 Comp. value
per shirt
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Formulas (Root 3600) 60Th Sixty Birthday T-Shirt
Qty:
Style
Basic Dark T-Shirt
-$1.30
+$9.40
Color & Print Process
Black
Vivid Printing: White Underbase
About T-Shirts
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About This Design
Formulas (Root 3600) 60Th Sixty Birthday T-Shirt
Are you invited to a milestone birthday? Is there a celebration, party? Cool design with different math formulas for the birthday child. For men and women who invite you to a birthday and are happy if you don't come to your birthday empty-handed. Why easy when it can be complicated? Funny, perfect gift idea for math nerds, teachers, number rotators, box pusher. The age of the birthday person can be calculated from the square root.
Customer Reviews
4.7 out of 5 stars rating31.6K Total Reviews
31,573 Reviews
Reviews for similar products
5 out of 5 stars rating
By Jenny S.September 9, 2025 • Verified Purchase
Value T-Shirt, Black, Adult S
My 11 yo wore adult XL (5’7” 165#). The 8yo is small framed. She wore adult small and tied it in the back. Dark haired male wore adult large and 5’9”, 110# female wore adult medium . Good quality dark Heather gray, Gildan brand shirt. -it was next up from basic choice and cost about $20 per shirt. Not too thick or thin. Washed and dried well, no major shrinkage. Not see-through. Can wear a bra under it fine. Screen print is just as shown and well done, front and back.
5 out of 5 stars rating
By Jenny S.September 9, 2025 • Verified Purchase
Value T-Shirt, Black, Adult S
My 11 yo wore adult XL (5’7” 165#). The 8yo is small framed. She wore adult small and tied it in the back. Grandma wore adult large with long sleeve shirt underneath. Tall girl adult medium. Dark haired male adult large. Good quality dark Heather gray, Gildan brand shirt. -it was next up from basic choice and cost about $20 per shirt. Not too thick or thin. Washed and dried well, no major shrinkage. Not see-through. Can wear a bra under it fine. Screen print is just as shown and well done, front and back.
5 out of 5 stars rating
By Jenny S.September 9, 2025 • Verified Purchase
Value T-Shirt, Black, Adult S
My 11 yo wore adult XL (5’7” 165#). The 8yo is small framed. She wore adult small and tied it in the back. Dark haired male wearing adult large and female wearing adult medium. Good quality dark Heather gray, Gildan brand shirt. -it was next up from basic choice and cost about $20 per shirt. Not too thick or thin. Washed and dried well, no major shrinkage. Not see-through. Can wear a bra under it fine. Screen print is just as shown and well done, front and back. They printed random cupcake image I downloaded from internet with no problems! Looked perfect! Front design was stock from zazzel.
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Other Info
Product ID: 235210027538297154
Created on: 12/9/2021, 12:30 PM
Rating: G
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